At the local game store the other night there was a guard player playing a tau player. An innocent enough endeavor. The guard player rolled some dice for what ever monotonous gaming reason. And there it stood... One dice against all odds. A dice that beat physics ass. The dice was standing on edge on a flat surface with nothing around it. Everyone in the store agreed that if you could roll that then it counted. The player rolled a 14 on a D6. (6,5,3) To bad it wasn't for an armor pen...
Conclusion: A lasgun can potentially penetrate a land raider.